Hi guys, i am moving to a new address that's served by optimum online. For TV, i want to get the cheapest package (just basic channels + their HD counterparts).
The prime mover for flexion of the shoulder muscles used are the following: 1  Pectoralis Major Clavicle. 2  Anterior Deltoid. 3  Biceps Brachii Short Head. 4  Coracobrachialis.
1 Each portion has a different action on the body. 2  The anterior portion flexes and medially rotates the arm, while the middle portion abducts the arm. 3  Finally the posterior portion extends and laterally rotates the arm. 4  The deltoid muscle takes over lifting the arm once the arm is away from the side. It also draws the shoulder downward and backward and keeps the inferior angle of the scapula against the chest wall. 2  Side (lateral) muscles of the shoulder: 3  The large deltoid muscle provides the characteristic contour of the shoulder and is the largest, strongest muscle of the shoulder.